Resign from company

I have a problem I want to exit/resign but my employer don't want to maybe because they are lack of employee. I want to resign because of family issues and also the company is 9 months delay already, the problem is I already signed a new contract before my previous contract is to be expired, I sign new contract because they promised me that they let me go for vacation but until now I am still here. Please help, what will I do?

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